Printing press



5 Shets-Sheet l H. V. DORN PRINTING PRESS March 16, 1954 Filed sept. 15, 1947 /NVENTOR H. V. DOR/V By MMS.

TTORNEY MDW H. V. DORN PRINTING PRESS March 16, 1.954

5 Sheets-Sheet 2 Filed Sept. 13, 1947 )Nl/Enron H. v. DOR/v NPQ.

A 7' TORNEY March 16, 1954 Filed sept. 13, 1947 5 Sheets-Sheet 5 l si IE@ @|33 o Iri O O @C om @f EEO @El 4 1 :Elo @E o o o L@ l ATTORNEY Filed Sept. 13, 1947 SSheetS-Sheet 4 /NVEN TOR H. V. DOR/V WMM A TTORNEY March 16, 1954 H. v. DORN lPRINTING PRESS 5 sheets-sheets Filed Sept. 13, 1947 /NVE/VTOR H V. DOR/V ATTORNEY 3 plate 32 to receive printed indicia, when placed firmly against the two positioning members 3|) and 3l will be in an accurately predetermined position on the bed 23.

An inking bed, generally indicated at 33, is generally similarly constructed and formed, and positioned on rollers 34 near the rear end of the frame (left in Fig. l) to have longitudinal but not lateral freedom of motion relative to the frame. A spring 35 keeps the inking bed, when otherwise free, a little forward of its proper inking position. The inking bed comprises a base plate 35, transverse girders 31, a metal top plate 33, a layer of felt 33 cemented thereon, and a glass surface plate cemented to the felt.

Four normally vertical links 4|, 42, 43 and 44 are pivotally mounted in pairs on the opposite sides of the frame at and 48: and a horizontal carrying frame 41 is pivotally attached at 48 and 49 to the upper ends of the links 4|, 42, 43 and 44 so that while the carrying frame 41 is always parallel to the top surfaces of the printing bed and inking bed, it may be moved freely at will into either of the extreme positions indicated in Fig. l in broken lines at 5| and 52 in order to bring the printing plate generally indicated at 50 into contact with work on the printing bed 23 or into contact with ink on the top surface of the inking bed 33. The carrying frame 41 is yieldingly maintained in the inoperative middle position shown in full in Fig. l by means of a counterweighted lever 53 pivoted at 45 and rigid with the link 42. A transverse bar 54 is mounted in the frame 41 as a handle for manipulation of the frame.

The frame 41 is provided with rigidly attached horizontal flanges or lugs and 55 having vertical cam apertures 51 and 58 formed therein. Vertical cam pins 53 and 60 are rigidly mounted on the bed 23; and identically similar vertical cam pins 6| and 62 are rigidly mounted on the bed 33.

The various parts thus far described are so arranged, connected, related and dimensioned that when an operator standing before the right (Fig. i f

l) end of the machine, pulls the handle 54 toward himself (forward) the frame 41 moves arcuately forward and down until the bevelled tops of the pins 59 and 6|) enter the perforations 51 and 58 respectively. The pins are held a trifle back of their proper positions by the spring 24 at this moment; but the apertures 51 and 58 can register with the pins since the frame 41 has not yet reached the fully forward position of its arcuate path. As the frame 41 is forced on down, the rear faces of the pins 59 and 63 are held continuously engaged against the rear peripheries of the apertures 51 and 58 by the tension of the spring 24, as the lugs 55 and 53 continue to move slightly forward as well as down. Thus the lugs 55 and 55 compel the pins 53 and 33 and with them the bed 23 to move forward at exactly the same rate as the forward component of the motion of the printing plate 50. Thus while the pins 59 and 60 are engaged in the apertures 51 and 58 in the lugs 55 and 56 under the tension of the spring 24, there can be no relative horizontal displacement of the bed 23 and the printing plate 5U. These approach to and recede from mutual contact in a direction perpendicular to both, guided by the rear faces of the pins 59 and 50. Especially during the actual contact of type members on the plate 50 with a base plate 32 to be printed and resting on the bed 23, there can be no slip of one on the other along the horizontal plane of their contact, no smearing of the printed indicia.

1n similar fashion, when the operator pushes the bar 54 away or backward, the frame 41 travels arcuately back and down; the lugs 55 and 55 en" gage the pins 6| and 62 in the apertures 51 and 5B and so force the inking bed 33 to accompany the backward horizontal component of motion of the printing plate 53 while the relative motion of the plate 53 and ink bearing glass 43 becomes one purely perpendicular to both. Thus the type approach to the ink surface, make Contact thereon, and recede therefrom without any slip of one on the other along the contact plane. Hence no ink is scraped up upon the vertical sides of the type to smudge the next printing impression on a plate 32.

To round out the description, it may be noted that means such as the springs 33 may be provided to cushion too swift or forceful operation.

The particular apparatus disclosed is one designed and made to print indicia on metal base plates as illustrated in detail in Fig. 5. In such case a simple method of making the printing plate 50 as shown in detail in Fig. 3, is to take such a plate 32 and cement thereon in the desired predetermined locations, suitable, elastic type. Thus as shown in Fig. 4, the main member of a plate 59 may be a plate |32 identically like the plate 32, having cemented thereon rubber type 64 having a type face 65 of solid soft rubber and an underbody 36 of sponge rubber.

In the modified form shown in Figs. 6 and 7, the printing bed |23 and inking bed |33 are rigidly mounted on the machine frame while the printing plate 50 is directly mounted on an auxiliary frame 61 which is mounted in the frame 41 on rollers 68 to have longitudinal motion only in the frame 41 under the influence of the two springs 69. The pins 59, 60, 6| and 62 are rigidly mounted as before in the beds |23 and |33. The cam apertures are formed in members of the frame 51 as indicated at cam aperture 51 in member |55 in Fig. 7. The manipulation in the case 0f this form of the machine is the same as before; but here the printing plate is floatingly movable and cammed into perpendicular approach to and recession from the beds |23 and |33, instead of vice versa.

In the third form, shown in Fig. 9, the beds |23 and |33 are rigid on the main frame; and the printing plate is rigid on the frame 41. But the links 4|, 42, etc. which carry the frame 41 are pivoted on a carriage 10 which floats on the main frame on rollers 1| between opposed Springs |39. Here the cam pin |59 is shown mounted on the frame 41 and the cam apertures 251 and `351 are shown in suitable members of the main frame. The precise form and nature of these coacting cam member pairs are not important to the invention so long as the desired cam effect is produced; nor is it in any way material to the invention Whether the pin is below and the aperture above or vice versa. The essential feature of the invention is the provision of floating longitudina1 freedom of motion against spring tension of the printing plate relative to the printing bed only if there is no inking bed, or to both beds if both are present, together with cam devices to compel the final approach to and rst recession from each other of the printing plate and either bed to be along a mutually perpendicular direction regardless of what motions the two may make together in other directions.

5 i Y Aninking roller lllll isv located on a suitable inkingarm l] whichis pivotally mounted at H9. Whenthe printing plate D ismoved to its printing position, the inking roller 1.00 moves over the right end of the inking bed 33, spreading andsmoothing the ink at that end. -As the printing 'plate 50 is moved to its inking position, shaft extensions |02 of the inking roller begin-to ride on edges |93 of inclined runways |04. Since the shaft extensions HlZv have a much smaller diameter than the inking roller, their movement on the inclined runways |04 have the eilect ofrspinning the inking roller and causing a different part of its periphery to contact the inking bed `each time the printing plate`f50 is moved from the inking bed to its printing'position. The use of these runways therefore overcomes the obviously bad situation of having a particular portonof the inking bed always contacted by the same part ofthe'inking roller. A nut W5 and threaded extension |06 are used in conjunction with bracket 101 to increase-or decrease the angle of the inclined runways Nit.

What is claimed is z l.v Inl a printing-press having a main frame, a printing bed unit supported on the frame to position an articleto haveindioia printed thereon, a printing plate unit having type thereon to print the indicia on the article, a linkage unit supported on the frame to support the plate unit i and compel the same generally to approach tol and recede from the article along an arcuate path, anti-friction members between one of said units and the immediate support therefor to enable the said one unit to noat longitudinally of the main frame, a cam member rigidly mounted with respect to said printing bed unit and having its camming surface perpendicular to the printing bed, and a cam member to coact therewith and rigidly mounted with respect to said printing plate unit to compel such relative motion of these two units with respect to each other as will make the nal approach of the printing plate to the printing bed and the initial recession of the printing plate from the printing bed to be along a direction perpendicular to the plane of printing contact of type and article,

2. In a printing press having a main frame, a printing bed unit supported on the frame to position an article to have indicia printed thereon, a printing plate unit having type thereon to print the indicia on the article, a linkage unit supported on the frame to support the plate unit and compel the same generally to approach to and recede from the article along an arcuate path, anti-friction members between one of said units and the immediate support therefor to enable the said one unit to float longitudinally of the main frame, a resilient member to maintain the floating unit yieldingly slightly out of operative position, a cam member rigidly mounted with respect to said printing bed unit and having its cammng surface perpendicular to the printing bed, and a cam member to coact therewith and rigidly mounted with respect to said printing plate unit to compel such relative motion of these two units against the tension of the resilient member and with respect to each other as will make the final approach of the printing plate to the printing bed and the initial recession of the printing plate from the printing bed to be along a direction perpendicular to the plane of printing contact of type and article.

3. In a printing press having a main frame, a

printima; bed Yunit supportedon the frameto positionan, article tohave indicia printed thereon, a printing plate unit havingy type thereon to print the indicia on the article, a linkage unit supported on the frame to support the plate unit and compel the same generally to approach to and recede from the article along an arcuate path,y anti-friction members interposed between the printing bed unit.V and the main frame to enable the printing bed to oat longitudinally oftheY frame, a cam memberrrigidly mounted with respect to said printing bed unit and having its camming surface perpendicular to the printing bed, and a cam member to coact therewith-and rigidly mounted with respect to said printing plate unit to compel such relative motion of these two units with respect to each other Aas will make the nal approach of the printing plate to the printingv bed and the initial recessionA of the printing plate from the printing bed to lie-along a direction perpendicular to the plane of printing contact of type and article.

4. In a printingpress having a main frame, a printing bed unit supported on the frame to position an article to have indicia printed thereon, a

printing plate unit having type thereon to print theA indicia on the article, a linkage unit supported on the frame to support the plate unit and compel the same generally to approach to and recede fromv the article along an arcuate path, anti-friction members interposed between the printing bed unit and the main frame to enable the printing bed to float longitudinally of the frame, a resilient member to maintain the floating unit yieldingly slightly out of operative position, a cam member rigidly mounted with respect to said printing bed unit and having its camming surface perpendicular to the printing bed, and a cam member to coact therewith and f rigidly mounted with respect to said printing plate unit to compel such relative motion of these two units against the tension of the resilient member and with respectto each other as will make the final approach of the printing plate to the printing bed and the initial recession of the printing plate from the printing bed to be along a direction perpendicular to the plane of printing contact of type and article.

5. In a printing press having a main frame, a

I printing bed unit supported on the frame to position an article to have indicia printed thereon, an inking bed unit supported on the main frame, a printing plate unit having type thereon to print the indicia on the article, a linkage unit supported on the frame to support the plate unit and compel the same generally to approach to and recede from the article and the inking bed alternatively along an arcuate path, anti-fric- ,tion members interposed between the printing bed unit and the main frame to enable the printing bed to oat longitudinally of the frame, anti-friction members interposed between the inking bed unit and the main frame to enable the inking bed to float longitudinally of the main frame, a cam member rigidly mounted with respect to said printing bed unit and having its camming surface perpendicular to the printing bed, a cam member rigidly mounted with respect to said inking bed unit and having its camming surface perpendicular to the inking bed, and a cam member to coact alternatively with said rst and second mentioned cam surfaces and rigidly mounted with respect to said printing plate unit `to compel such motion of the printing plate unit with respect alternatively to the printing bed 7 unit and to the inking bed unit that `the final approach of the printing plate to and its initial recession from either bed will be along a direction perpendicular to the plane of contact therewith.

6. In a printing press having a main frame, a printing bed unit supported on the frame to position an article to have indicia printed thereon, an inking bed unit supported on the main frame, a printing plate unit having type thereon to print the indicia on the article, a linkage unit supported on the frame to support the plate unit and compel the same generally to approach to and recede from the article and the inking bed alternatively along an arcuate path, anti-friction members interposed between the printing bed unit and the main frame to enable the printing bed to float longitudinally of the frame, anti-friction members interposed between the inking bed unit and the main frame to enable the inking bed to oat longitudinally of the main frame, resilient members to maintain the oating units yeldingly slightly out of operative position, a cam member rigidly mounted with respect to said printing bed unit and having its camming surface perpendicular to the printing bed, a cam member rigidly mounted with respect to said inking bed unit and having its camming surface perpendicular to the inking bed, and a cam member to coact alternatively with said first and second mentioned cam surfaces and rigidly mounted with respect to said printing plate unit to compel such motion against the tension of the resilient members and of the printing plate unit With respect alternatively to the printing bed unit and to the inking bed unit that the nal approach of the printing plate to and its initial recession from either bed will be along a direction perpendicular to the plane of Contact therewith.

HENRY V. DORN.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 84,440 Reese Nov. 24, 1868 537,442 Dorticus Apr. 16, 1895 808,541 Hampton Dec. 26, 1905 948,931 Meyer Feb. 8, 1910 1,055,932 Martin Mar, 11, 1913 1,291,026 Koehler Jan. 14, 1919 1,360,063 Waters Nov. 23, 1920 1,411,788 Kellogg Apr. 4, 1922 1,441,797 Gibson Jan. 9, 1923 1,969,505 Freeman Aug. 7, 1934 2,015,994 Eaton Oct. 1, 1935 2,091,724 Whistler Aug. 31, 1937 2,242,104 Boyer May 13, 1941 2,593,713 Willett Apr. 22, 1952 FOREIGN PATENTS Number Country Date '325,401 Germany Sept. 11, 1920 

